#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char **argv)
{


   int fd;		
   if(argc<2)
   {
   fprintf(stderr,"Usage.......\n");
   exit(1);
   }

   fd = open(argv[1],O_WRONLY|O_CREAT|O_TRUNC,0600);
   if(fd<0)
   {
    perror("open()");
	exit(1);
   }


   lseek(fd,5*1024ll*1024ll*1024ll-1,SEEK_SET);
   write(fd,"",1);
   close(fd);


	exit(0);
}
